Machine for smoothing curved surfaces



2 H S A N M .IM

MACHINE FOR SMOOTHING GURVED SURFAGES.

No. 430,398. Patented June 17, 1890.

r. l "di (No Model.) 2 Sheets-.Sheet 2. v

J. M. NASH. MACHINE .POR SMOOTHING vGURVED SURPAGBS.

No. 430,398. vPatented June 17, 1890.

UNITED STATES PATENT OFFICE.

JOHN M. NASH, OF HUDSON, VISCONSIN.

MACHINE FOR SMOOTHING CURVED SURFACES.

SPECIFICATION forming part of Letters Patent No. 430,398, dated June 17,1890.

Application tied ruiy 22, 1889.

.To all whom it may concern:

Be it known that I, JOHN IWI. NASH, of Hudson,in the county of St.Croix, and in the State of Visconsin, have invented certain new anduseful Improvements in Machines for Smoothing Curved Surfaces; and Idohereby declare that the following is a full, clear,vand eXactdescription thereof.

My invention relates to machines for smoothing curved surfaces; and itconsists in certain peculiarities of construction and combination ofparts to be hereinafterdescribed with reference to the accompanyingdrawings and subsequently claimed.

In the drawings, Figure l represents a side elevation of my machinepartly in vertical transverse section; Fig. 2, a front elevationl partlyin section; Fig. 3, a detail elevation,

partly'in section, illustrating one side of a rotary drum and system ofgearing carried thereby to actuate a pair of feed-rolls; Fig. 4, adetail plan view of the drum in horizontal section to illustrate itsconnection with a stationary head; Fig. 5, a detail elevationillustrating the drum and its gear-connection with the stationary head;Fig. 6, a detail sectional view on line 6 6, Figs. 3 and 5; and Fig. 7,a similar view on line 7 7, Fig. 3.

Referring by letter to the drawings, A represents a standard thatconstitutes the base of my machine, and B a table arranged to slide onthe top of the standard. As illustrated in Fig. 2, the table B isdovetailed to the standard A; but this construction is not absolutelyessential.

The rear of the table B is provided with a vertical lug b, having ascrew-threaded perforation therein for engagement with a screw C, thatpasses through a non-threaded perforatione in a vertical flange or lug don the standard A, and is provided with a handwheel D, by which it maybe adjusted to regulate't-he throw of said table, the latter being shownas provided upon its under side with a socket e for engagement with anarm E, that is fast on a shaft F, actuated by a lever F having itsbearings in the standard A, this construction being best illustrated inFig. l.

By means of the lever mechanism the table B is moved to or from asand-belt G or other suitable abrading surface; but, while I have shownand described said lever mechanism,

Serial No. 318,210. (No model.)

it is obvious that the same result can be attained by means ofrack-and-pinion gear or other mechanical equivalents, and therefore I donot wish to be understood as limiting myself to said lever mechanism.

In Fig. 1 the arm E is shown on center ready to move either to the rightor left, accordingly as the lever F is actuated. If the arm E is movedto the right, the table B will move therewith until the hub of thehandwheel D comes against the lug Cl on standard A but if said arm bemoved to the left, the corresponding movement of the table is checkedwhen the lug b on said table comes against the one on said standard, theamount of throw in either direction being regulated by the adjustment ofthe screw C, above described.

Bolted or otherwise rigidly secured to the table B are two opposingbrackets H, and connected to each bracket in a like manner is a head I,having an inwardly-extended sleevef, that fits upon a tubular hub g,extending outward from the face-plate 7L of aflanged drum J, the latterbeing held in its relation with fsaid head by means of a collar t', faston the outer end of the hub g, as is best illustrated in Figs. 1 and 4.

The sleeves f of the heads I are provided with gear-teethj, that meshwith pinions 7c on worm-shafts m, journaled in brackets K', bolted orotherwise rigidly secured to the inner sides of the face-plates h of thedrums J. The worm-shafts m mesh with worm-wheels n on shafts o, thathave their bearings in brackets L, rigidly secured to the outer sides ofthe face-plates h of the drums J, and the Worm-gear just described iscovered by housings p, also secured to the outer sides of saidface-plates.

The shafts o carry pinions q, that mesh with pinions fr on other shaftss, the latter being parallel to the former and having their bearings inbrackets t, pivoted to the outer sides of the face-plates h of the drumsJ, as best illustrated in Fig. 3. Fast to the shafts s are opposingconcave feed-rollers M, and the squared ends u of the pivoted bracketst, that form the bearings for said shafts, are passed through housingsfu, that inclose spiral springs w, the latter being adjustable as totension by means of followers actuated by screws IOO y, the latterhaving their bearings in said housings, this construction being alsobest illustrated in Fig. 3.

The feed-rollers M are arranged in pairs adjacent to the inner ends ofthe hubs g, that extend from the face-plates h of the drums J, and saidhubs are interiorly provided with annular shoulders z, that form stopsfor bushings N, each of the latter being provided at its outer end withan annular groove z for engagement with a cam O on a screw P, thathas'its bearing in the adjacent face-plate 7L, the latter being providedwith a recess h for the cam. By the construction just described thebushings N are detachably retained in position, it being designed thateach machine shall be accompanied by a number of bushings having boresof various diameters to accommodate stuff of varying thickness, and Iprefer to have the mouth of each bushing funnel-shaped, in order thatthe material may not be impeded in its travel.

The drums .I are to be driven by suitable belts or otherwise, and bytheir rotation cause the pinions 7c to travel around the sleeves f ofthe stationary heads I and derive rotary motion from the fact of theirbeing in mesh with the gear-teethyl on said hubs, this rotary motionbeing communicated to the feed-rollers M by means of the shafts andgearing above described. By the above description it will be readilyseen that the feed-rollers have both a planetary movement and a rotationon their axes, whereby the stuff to be smoothed is kept continuallyturning and at the same time carried along in a longitudinal direction.

In the operation of my machine a chair-leg, hoe-handle, or other devicehaving a curved surface is pushed through the bushing N belonging tothat drum J on the lever side of the machine and caught between theadjacent pair of feed-rollers M, the latter being held in frictionalcontact with said device by the power of the springs w, that :impingeagainst the pivoted sleeves t, in which the roller-carrying shafts shave their bearings. By having the sleevest pivoted the feed-rollers Mwill automatically adjust themselves to varying thickness of the stuffto be smoothed.

The device to be smoothed having been caught by a pair of thefeed-rollers M, the operator actuates the lever F to impart a forwardmovement to the table B, whereby said device is brought into frictionalcontact with the sand-belt G or other abrading-surface and rotatesagainst the latter while traveling in a longitudinal direction. The nextpair of feedrollers grip the device in the process of smoothing and feedit along through the bushing in that drum opposite the one at which theoperation began, and said device is thus carried its entire lengthagainst the sand-belt, a fork Q being preferably secured to thestationary head I on the finishing side of the machine to aid insupporting the device after it has passed out of contact with the irstpair of feed-rollers.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The combination, with an abrading device, of spring-controlledbearings, shafts arranged in the bearings, opposing feed-rollers carriedon the shafts adjacent to the abrading device, and suitable mechanismfor imparting a planetary and rotary movement to the feed-rollers,substantially as set forth.

2. The combination, with an abrading device, of a sliding table carryingfeed-rollers arranged in pairs to come adjacent to the abradin g deviceand having a planetary movement simultaneous with a rotation on theiraxes, substantially as set forth.

3. The combination, with an abrading device, of a sliding tableadjustable as to throw and carrying feed-rollers arranged in pairs tocome adjacent to the abrading device and having a planetary movementsimultaneous with a rotation on their axes, substantially as set forth.

4. The combination, with an abrading device, of a revoluble drurn havinga tubular hub, a pair of feed-rollers carried on shafts arranged inbearings on the drum, pinions fast on these shafts, counter-shaftshaving their bearings on the drum. and provided with pinions that meshwith those on the feed-roller shafts, worm-wheels carried by thecountershafts, worm-shafts also having their bearings on said drum andarranged to mesh with the worm-wheels, pinions carried by thewormshafts, and a stationary circle of gear-teeth 'arranged to mesh withthe latter pinions, substantially as set forth.

5. The combination, with an abrading device, of a revoluble drum havinga tubular hub, a bushing detachably secured in the hubs, a pair offeed-rollers carried on shafts arranged in bearings on the drum, pinionsfast on these shafts, counter-shafts having their bearings on the drumand provided with pinions that mesh with those on the feedroller shafts,worm-wheels carried by the counter-shafts, worm-shafts also having theirbearings on said drum and arranged to mesh with the Worm-Wheels, pinionscarried by the wormshafts, and a stationary circle of gear-teetharranged to mesh with the latter pinions, substantially as set forth.

G. The combination, with an abrading device, of a sliding table, a headrigidly secured to the table and having a sleeve provided with a circleof gear-teeth thereon, a revoluble drum having a tubular hub arrangedwithin said sleeve, a pair of feed-rollers carried on shafts arranged inbearings on the drum, pinions fast on these shafts, countershafts havingtheir bearings on the drum and provided with pinions that mesh withthose on the feed-roller shafts, worm-wheels carried by thecounter-shafts, worm-shafts also IOO IIO

having their bearings on said drum and arranged to mesh with theWorm-Wheels, and pinions Carried by the Worm-shafts to mesh with thegear-teeth on the stationary head, substantially as set forth.

7. The combination, with an abrading device, of a base, a table arrangedto slide on the base, a screw extended through a guidev on the base toengage the table, a head rigidly secured to the table and having asleeve provided With a eirele of gear-teeth thereon, a revoluble drumhaving a tubular hub arranged within said sleeve, a pair of feedrollerscarried on shafts arrangedin bearings on the drum, pinions fast on theseshafts, counter-shafts having their bearings on the drum and providedwith pinions that mesh with those on the feed-roller shafts, Wormwheelscarried by the counter-shafts, Worinshafts also having their bearings onsaid drum and arranged to mesh With the Worm- Wheels, and pinionscarried by the wormshafts to mesh With the gear-teeth on the stationaryhead, substantially as set forth.

8. The combination, with an abrading deviee, of a base, a table arrangedto slide on the base and having its under side provided with a socket; alever-actuatedV shaft having its bearings in said base and provided withan arm that engages said socket, a head rigidly secured to the table andhaving a sleeve provided with a eirele of gear-teeth thereon, arevoluble "drum having a tubular hub arranged Within said sleeve, a pairof feedrollers carried on shafts arranged in bearings on the drum,pinions Vfast on-these shafts, counter-shafts having their bearings onthe drum and provided with pinions that mesh with those on thefeed-roller shafts, Worm- Wheels carried by the counter-shafts,`Wormsha-t'ts also having their bearings on said drum and arranged tomesh with the Worn1-Wheels, and pinions earried by the Worin-shafts tomesh with the gear-teeth on the stationary head, substantially as setforth.

` In testimony that I claim the foregoing I have hereunto Set my hand,at Milwaukeain the county of Milwaukee and State of Wiseonsin, in thepresence of two Witnesses.

JOHN M. NASH.

Vitn esses:

S. S. SroU'r, H. G. UNDERWooD.

